For the record

• We erroneously attributed to Thomas Frost the statement that sheep and goats cannot interbreed to produce viable offspring unless the embryos are genetically manipulated. The statement should have been attributed to the writer of the letter in which it appeared, Juliet Clutton-Brock (4 September, p 27).

• Nick Ashton is at the University of Manchester, UK, not Southampton as we stated (14 August, p 18).

• We accidentally relocated Denis Dutton to the UK. He actually works at the University of Canterbury in New Zealand (18 September, p 46).

• We misspelled the name of the conservation organisation, WildTrack, in our story on animal identification (18 September, p 20).